Photo Pin is a new website offering images that can be re-used for blog entries, video productions, slideshows, and print media. Photo Pin uses a combination of Flickr's API for Creative Commons search and Fotolia's image library to serve-up royalty-free images. The search results page on Photo Pin clearly delineates between images that are free to use and images that you have to purchase.
Applications for Education
If you're looking for a new way to find Creative Commons-licensed images for yourself or your students, Photo Pin could be a good option for you. I like that Photo Pin offers a clear reminder to users that they must correctly link to the sources of the images that they choose to use.